Claude Opus 4.8 Thinking vs Kimi K3 Fast
Kimi K3 Fast is cheaper on output tokens, while Kimi K3 Fast offers a larger context window. Choose Claude Opus 4.8 Thinking or Kimi K3 Fast based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Opus 4.8 Thinking | Kimi K3 Fast |
|---|---|---|
| Provider | NanoGPT | Neuralwatt |
| Input / 1M tokens | $5.00 | $3.00 |
| Output / 1M tokens | $25.00 | $15.00 |
| Context window | 1M | 1M |
| Parameters | — | — |
| Open weights | No | Yes |
| Released | May 2026 | Jul 2026 |
| LiveBench score | 79.5 | — |
FAQ
Is Claude Opus 4.8 Thinking or Kimi K3 Fast cheaper?
Kimi K3 Fast is cheaper on output tokens ($15.00 vs $25.00 per 1M).
Which has the larger context window, Claude Opus 4.8 Thinking or Kimi K3 Fast?
Kimi K3 Fast has the larger context window (1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.